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J.JAGOBS.

WAGON BRAKE.

No. 520,849. Patented June 5, 1894.

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I WAGON BRAKE.

No. 520,849. Patented June 5, 1894.

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. I UNITED. STATES PATENT OFFICE.

JONATHAN JAOOBS, OF BROWNINGSVILLE, MARYLAND, ASSIGNOR OF ONE- HALF TOWILLIAM H. BROADHURST, OF SAME PLACE.

WAGON-BRAKE.

SPECIFIGATION'forming part of Letters Patent No. 520,849, dated June 5,1894. Application filed rams; 15.1894. Serial No. 500,232. (Nomodeh) Toall whom it may concern:

Be it known that I, JONATHAN JAooBs, a citizen of the United States, anda resident of Browningsville, Montgomery county, State of Maryland, haveinvented certain'new and useful Improvements in Wagon-Brakes; and mypreferred manner of carrying out the invention is set forth in thefollowing full, clear,

and exact description, terminatingwith claims particularly specifyingthe novelty.

This invention relates to wagons, and more especially to the brakesemployed thereon; and the object of the same is to effect certainimprovements in devices of this character.

To this end the invention consists in the specific construction of thebrake-operating mechanism hereinafter more fully described and claimed,and illustrated in the accompanying drawings, wherein Figure 1 is anelevation of the right side of a box wagon showing my improved brake asattached thereto. Fig. 2 is a plan view of the rear bolster and houndsshowing the brake as released and showing certain modifications. Fig. 3is a plan view of the rear hand-lever and rack, the rock-lever herebeing illustrated in slightly modified form as continued past its pivot,the spring, and the pitman-showing the parts in position to apply thebrake. Fig. 4 is a cross section on the line 4-4. of Fig. 2 showing therock-shaft and its manner of longitudinal adjustment. Fig. 5 is aperspective detail of the brake shoe.

In the said drawings, the numerals 1 designate the wheels mounted onaxles and connected by a perch having the usual hounds and bolsters, and2 is the wagon body mounted on the latter.

3 is the brake beam here shown as sliding between guides 4. connectingthe ends of cross bars 5 supported by the rear hounds, and carrying atits ends brake shoes of the construction best seenin Fig. 5. These shoesmay he of any desired construction, but my preferred manner of formingthem is to make each of an upright plate-6 having a beveled upper end 7and a hole 8 through its bodythe plate being secured between its ends asat 9 to the end of the brake beam. This plate may be of cast iron, andthe shoe proper, 10,

is preferably formed of wrought iron and is shaped to conform withv therear face of the plate 6-having a lip 11 at its upper end which passesover and removably engages the bevel 7 at the upper end of the plate,and a hook 12 projecting to the rear from its body and adapted to bepassed through the hole 8 and then downward therein as the lip 11 ispassed over the bevel. The shank of the hook prevents lateral movementand also prevents the shoe from rising unless it is withdrawn obliquelyfrom the plate 6, and the lip 11 by engaging the bevel 7 furtherprevents a downward movement of the shoe and therefore resists thedownward movement of the front slide of the rear wheel which takes placewhen the brake is applied.

' 20 is a semi-circular toothed rack carried by and projecting to therear of the rearmost bolster, and 21 is a hand-lever pivoted at 22 tothis bolster at the center of said rack and carrying a spring-actuatedpawl 23 engaging the teeth on the rack and operated by a thumb lever 24.inthe usual manner. otal end of the lever 21 an arm 25 projectslaterally from the lever and carries a pin 26 to which is pivoted an eye'27 at the rear end of a link 28 which passes loosely through the rearbolster and has "a slot ,29 in its front end.

30 is a rock-lever suitably pivoted to an eye-bolt 31 projecting forwardfrom the rear bolster and having one end turned over upon itself as at32 with an upright bolt 33 passed through this end and the body of thelever and intermediately through the slot 29 in the link; and 34 isapitman rod pivotally connecting the center of the brake beam 3 with thislever 30 at a point 35 between the upright bolt 33 and the pivot at theeye-bolt 31. A spring. 36 secured to a suitable support (such as thebolster) presses the rock-lever 30 forward and normally throws the brakeshoes oi the wheels. By this construction it will be seen that whenthehelper who usually attends the driver of a hay wagon or a wagon carrying other heavy load, is walking behind the wagon as when the latter isgoing down a hill, he can manipulate the rear lever to draw on the linkwhich will turn the rock-lever around the eye-bolt and draw on thepitman to apply the brake with a power greater than that From thepivexerted by the rear lever; and by operating the thumb-lever andreversing the motion of the rear lever,he can take ed the brake. Thebrake beam slides between the guides4 which prevent its rise and fall aswill be understood, and the spring throws the shoes normally away fromthe wheels.

40 are two eye'bolts carried by the rear bolster in a horizontal planeabove the mechanism just described, and 41 is a rock-shaft journaled inthese eye-bolts and standing across the running gear beneath the wagonbody 2. Where it passes through one of the eye-bolts this rock-shaft hasthreads 42 carrying nuts 43 and 44 outside of which may be located jamnuts 45; and by unscrewing the nut 43 and screwing up the nut 44, andthen setting them with their jam nuts 45, it will be seen that therock-shaft can be adjusted longitudinally through itsjou rnals in theeyebolts for a purpose to appear below. On one end of the rock-shaft 41(preferably the right end as shown in Fig. 1) is a crank46 connected bya rod 47 standing alongside the wagon body 2 with a front lever 48 whichis pivoted at 49 at the center of a curved rack 50 carrying ratchetteeth, and which lever 48 stands adjacent the drivers seat. Bycontinuing this lever below its pivot 49 and connecting the rod 47 withits lower end, the direction of operative motion of the lever can bereversed in a manner which will be clear to any mechanic.

'51 isa pawl pivoted between its ends at 52 to the lever 48 and with itsrear end taking into the teeth of the rack 50.

53 is a thumb lever pivoted between its ends at 54 to the body of thelever 48 and connected at its lower end by a link 55 with the front endof the pawl, and 56 is a spring bearing the upper end of the thumb lever53 normally forward and away from the lever 48.

By the construction shown a forward movement of the lever 48 draws onthe rod 47 and through the crank 46 turns the rock-shaft 41, and appliesthe brake in a manner described below, while the pawl 51 travels overthe teeth and engages them at a point to hold the brake applied. Torelease the brake, the operator presses the upper end of the thumb lever53 which causes its lower end to move forward, and by means of the link55 depresses the front end of the pawl 51 and raises its rear end out ofthe teeth of the rack 50-after which the lever 48 can be moved asdesired. I consider this specific construction of front lever especiallyapplicable to a device of this character, because the exact connectionby means of the link 55 between the thumb lever and pawl causes thelatter to be tripped very quickly when the former is moved and hencepermits the brake to be released suddenly as is sometimes necessary.

Depending from the rock-shaft 41 is a finger 60 standing in front of thefree end of the rock-lever 30 as indicated in Fig. 1, and hence when thefront lever 48 is operated and the rock-shaft turns in the eye-bolts 40,this finger bears against the rock-lever 30 and. turns the same aroundits pivot in the eye-bolt 31 so as to draw on the pitman 34 and applythe brake. This motion, however, does not interfere with the rear lever,because as the rocklever moves the upright bolt or pin 33 at its freeend slides to the rear in the slot 29 of the link 28, and hence does notmove the link nor the rear lever. In the same way, the rear lever can bemoved to apply the brake without turning the rock-shaft or moving thefront lever, because the action of the rear lever merely draws therock-lever 30 away from the finger 60.

In Fig. 2 I have shown the rock-shaft 41 as continued to the left sideof the wagon, and carrying a side lever 61 at this side, although itwill be understood that such lever could stand at the other side of thewagon,that the crank and front lever could be located at the left sideof the wagon, that the side lever could be at one side and the frontlever at the other, or that the side lever could form the crank and thefront lever could be located on the same side of the wagon.

In Fig. 3 I have shown the rock-lever 30 as continued at 30' past itspivot in the eye-bolt 31, and here the finger 60 depends from therock-shaft and stands in rear of this arm 30 of the rock-lever insteadof standing in front of the other arm. This is a preferred constructionwhich I employ in certain cases.

In either construction it will be obvious that by adjusting the nuts 43and 44 on the rock-shaft the finger will be moved laterally of the wagontoward or from the pivot 31, and hence the force applied to the brake bythe side or front lever can be regulated at will.

All parts of this structure are of the desired sizes, shapes,proportions, and materials, and considerable change in and addition tothe specific details of construction may be made without departing fromthe principle of my invention.

What is claimed as new is- 1. In a wagon brake, the combination with acurved rack bar projecting rearward from the rear bolster, a levermoving thereover and having an arm projecting at an angle from itspivot, a link sliding through the bolster and having an eye at its rearend pivoted to said arm and a slot at its front end, an eyebolt in thefront of the bolster, and a rock lever pivoted to said eye-bolt andhaving one end bent back upon itself and carrying an upright bolt movingin said slot of the link and connecting the body of the rock lever withthe bent-over end; of a brake beam having brake shoes at itsextremities, a pitman connecting the beam with the rock lever, and aspring carried by the rcarbolster and bearing said rock lever normallyforward, as and for the purpose set forth.

2. In a wagon brake, the combination with a curved rack bar projectingrearward from the rear bolster, a lever moving thereover and having anarm projecting at an angle from its pivot, a link sliding through thebolster and having an eye at its rear end pivoted to said arm and a slotat its front end, an eye-bolt in the front of the bolster, and a rocklever pivoted to said eye-bolt and having an upright bolt moving in saidslot of the link; of cross bars carried by the rear hounds and connectedat their ends by guides, a brake beam moving between said bars andguides and carrying brake shoes,a pitman connecting the beam with therock lever, and a spring throwing the shoes normally away from thewheels, as and for the purpose set forth.

3. In a wagon brake, the combination with an eye-bolt in the rearbolster, a rock lever pivoted thereto and having an upright bolt at oneend, a rear lever, a link connected with the rear lever and having aslot loosely engaging said upright bolt, a brake beam, and a pitmanconnecting the brake beam with the rock lever between the pivot and boltof the latter; of a rock shaft journaled in bearings above said rocklever, means for operating the rock shaft independently of the rearlever, and a finger depending from said shaft and engaging said lever,as and for the purpose set forth.

4. In a Wagon brake, the combination with an eye-bolt in the rearbolster, a rock lever pivoted thereto and having an upright bolt at oneend, a rear lever, a link connected with the rear lever and having aslot loosely engaging said upright bolt, a brake beam, and a pitmanconnecting the brake beam with the rock lever between the pivot and boltof the latter; of eye-bolts carried by said bolster, a rock-shaftjournaled in the eyes in a plane above the rock lever, said shaft havingthreads adjacent one eye-bolt, nuts on the threads at each side of theeye-bolt, means for operating the rock shaft independent of the rearlever, and a finger on said shaft engaging the rock lever, as and forthe purpose set forth.

5. In a wagon brake, the combination with an eye-bolt projecting forwardfrom the rear bolster, a rock lever centrally pivoted in said eye-bolt,a rear lever, and a link connecting this lever with one end of the rocklever; of a brake beam, a pitman connecting the beam with the rock leverbetween the eye-bolt and the point of attachment of said link, arockshaft journaled in bearings above said rock lever, meansforoperating this shaft independent of the rear lever, and a fingerdepending from said shaft and standing in rear of the rock lever on theother side of the eye-bolt than the point of attachment of said pitman,as and, for the purpose set forth.

6. In a wagon brake, the combination with a rock lever pivotallyconnected with the rear bolster, a brake beam connectedwith said rocklever, and a rear lever for operating the rock lever to apply the brake;of a rock shaft standing adjacent the rock lever and having a tingeradapted to engage the same, a crank on one end of said shaft, a frontlever pivoted within a toothed rack carried by the wagon body, a rodconnecting said front lever and rank, and a thumb lever and pawl carriedby the front lever, as and for the purpose set forth.

In testimony whereof I have hereunto subscribed my' signature on thisthe 13th day of February, A. D. 1894.

JONATHAN JACOBS.

Witnesses:

WILLIAM H. BROADHURST, LITTLETON E. PRICE.

